. >> narrator: his dad thought civil rights were worth fighting for. as a teenager, mitt was less interested in the issues than being with his dad. >> the word from his family is that he was not necessarily interested in politics as ideology. but there was always something about his father and his father's power and his father's profession that kept him around and kept him close in a way that it didn't do that for other members of his family. (newsreel music plays) >> the eyes of the nation are on san francisco as the republican party convenes to nominate its choice for president. >> narrator: and in 1964, mitt traveled with his dad to watch him take on conservative republican senator barry goldwater. >> the republican party should unequivocally repudiate extremists of the right and the left, and reject their efforts to infiltrate or attach themselves to our party or its candidates. >> mitt is absorbing all of this. he sees his father basically taking a stand and admires his father greatly for this. >> narrator: but it was barry goldwater's convention.